OFDM Modulator and Demodulator Training System

Description

TechBook Scientech 2810 OFDM Modulator and Demodulator Training System Recently, a worldwide convergence has occurred for the use of Orthogonal Frequency Division Multiplexing (OFDM) as an emerging technology for high data rates. In particular, many wireless standards (Wi-Max, IEEE802.11a, LTE, DVB) have adopted the OFDM technology as a mean to increase dramatically future wireless communications. OFDM is a particular form of Multi-carrier transmission and is suited for frequency selective channels and high data rates. This technique transforms a frequency-selective wide-band channel into a group of non-selective narrowband channels, which makes it robust against large delay spreads by preserving orthogonality in the frequency domain. Moreover, the ingenious introduction of cyclic redundancy at the transmitter reduces the complexity to only FFT processing and one tap scalar equalization at the receiver.

In this TechBook, we have focused on the practical learning and experimentation of OFDM with signal analysis at various stages.

Product Features

• OFDM Modulator and Demodulator system in a handy TechBook
• User friendly real-time interactive control and acquisition software for detail study of OFDM
• Software control built-in data pattern generator
• 64 point IFFT & FFT with Baseband QPSK modulation & Demoudulation Techniques.
• Built-in Mixed signal oscilloscope to analyze in time domain at various stages of OFDM
• Built-in noise generator for analysis of noise gain on the signal.
• On-board BNC connector for OFDM baseband I-Q signal analysis on external DSO.
• LED indications on TechBook
• USB Interface
• Scope of Learning
• OFDM Modulator and Demodulator Experimentation with and without noise gain. SIgnal Analysis at various stages like, Transmit data & Received data, IFFT & FFT, Symbol mapper & de-mapper per channel, and Cyclic prefix & its removal.

Technical Specification

• Technique : OFDM with QPSK modulation & Demodulation
• Software programmable data rate
• Built in real-time data acquisition system with time domain signal analysis
• Buit in Two channel Additive White Gaussian Noise Generator
• I & Q Channel DACs-10 bit
• Anti aliasing low pass filter with 3dB bandwidth of I & Q channel filter: Sallen Key 6-pole Butterworth.
• Block Level LED indication on TechBook.
• Mains Supply : 110-220 V AC, 50/60Hz
• Operating Conditions : 0-40 C, 80% RH
• Weight : 2 Kg (approximately)